Examining the Umarex Komplete air rifle: Part Six

Umarex Komplete air rifle.

Part 1
Part 2
Part 3
Part 4
Part 5

This report covers:

• Weight
• Fill
• Rationale
• Test
• Benjamin Single Die pellets
• JSB Exact Jumbo RS
• RWS Hobby
• Shot count
• Nitrogen and air are close to the same
• Summary

Today we see how well the Air Venturi PCP Conversion for Umarex Komplete works. I received it Monday and I tested it Tuesday, though this report took a few days to make it through the queue.

The Air Venturi PCP Conversion tank for the Komplete is longer than the NitroAir cartridge.

Weight

An empty NitroAir cylinder weighs 12.4 ounces / 351.53 grams. The empty Air Venturi PCP Conversion weighs 15.4 ounces / 436.58 grams. So it’s just slightly heavier.

The rifle with the conversion tank installed.

Fill

The conversion tank fills to 3650 psi / 251.66 bar. The coupling is a standard male Foster fitting, so I attached it to my RovAir compressor and turned it on. Ten minutes later when the compressor gauge needle had not moved I shut it off and moved over to a carbon fiber air tank. When I opened the valve air rushed violently out the threaded end of the Air Venturi tank.

So I emailed Tyler Patner and told him what had happened. He responded with, “You didn’t try to fill the tank while it was off the gun did you?”

So I said, “I just did it to demonstrate what happens when someone is foolish enough to try doing it that way.” Then I attached the tank to the rifle and my RovAir compressor filled the Air Venturi PCP conversion tank from empty to full in about 3 minutes.

Rationale

This conversion tank changes the Umarex Komplete from a too-costly-per-shot PCP to an extremely affordable PCP that costs nothing to fill, once you have the gear. And please don’t tell us that the gear needed to fill the gun is expensive. Your car isn’t worth more just because you have put $5,000 worth of gas in it. You’re either in the precharged game or not and if you are the Komplete is now an extremely affordable way to go.

Test

I tested the rifle with the same pellets I used in Part 2 to test the NitroAir cylinder. Let’s begin.

Benjamin Single Die pellets

I began with Benjamin Bullseyes. In Part 2 with the NitroAir cylinder they averaged 928 f.p.s. with a 17 f.p.s. spread from 921 to 938.

With the Air Venturi conversion tank they averaged 918 f.p.s with a 15 f.p.s. from 911 to 926 f.p.s. In terms of energy the Bullseye develops 26.77 foot-pounds at the muzzle. 

The discharge noise with the nitrogen cylinder was 107 dB. With air it was 107.6 dB.

JSB Exact Jumbo RS

Next up was the JSB Exact Jumbo RS pellet. With nitrogen ten of them averaged 946 f.p.s. The spread was 18 f.p.s. from 936 to 954 f.p.s.

On high-pressure air ten averaged 938 f.p.s. the low was 932 and the high was 952 for a spread of 20 f.p.s. It develops 26.24 foot pounds at the muzzle.

RWS Hobby

The last pellet tested was the RWS Hobby wadcutter. On nitrogen Hobbys averaged 972 f.p.s. The low was 957 and the high was 984 f.p.s. That’s a difference of 27 f.p.s.

On high-pressure air ten Hobbys averaged 977 f.p.s. The low was 965 and the high was 987—a difference of 22 f.p.s. At the average velocity this pellet developed 24.97 foot pounds at the muzzle.

Shot count

After these three tests I shot another string of Benjamin Bullseyes. This time the average was 911 f.p.s. with a low of 891 and a high of 922 f.p.s. That’s a spread of 31 f.p.s and the rifle fell off the power curve at the end of the string.

With the same Bullseye pellet here are the next 10 velocities:

Shot…..Vel
1………..898
2………..881
3………..871
4………..838
5………..826
6………..826
7………..800
8………..802
9………..769
10………756

Nitrogen and air are close to the same

The performance of the high-pressure air tank is very close to what the nitrogen cylinder gives. It had fewer shots this time but I don’t know what pressure I filled to. I set the RovAir to stop at 3,500 psi because in the past we learned that it fills higher than indicated. So there is no good way to test the fill pressure, but these results are close enough for me and, as mentioned, the fill cost nothing.

Summary

This air tank just changed the game for the Umarex Komplete. Except for no way to load single pellets easily, this PCP is almost complete.

I don’t expect the accuracy to change and there are several more pellets I want to try, so the Air Venturi PCP Conversion has put us back in the game.

Tom Gaylord (B.B. Pelletier)

Tom Gaylord, also known as B.B. Pelletier, provides expert insights to airgunners all over the world on Pyramyd AIR. He has earned the title The Godfather of Airguns™ for his contributions to the industry, spending many years with AirForce Airguns and starting magazines dedicated to the sport such as Airgun Illustrated.

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